10.9. Existing biogas installations

There are biogas plants worldwide with different degrees of technical developments. There are thousands of biogas plants in Europe and North America which process agricultural byproducts, while there are millions of small-scale digesters in China and India. Europe has advanced biogas plants in operation, and Germany is the leader, particularly, in biogas production from agricultural residues and sewage sludge. In 2012, there were 8960 biowaste digesters (mainly farm-based; 171 industrial-scale) in European Union, which convert agricultural, industrial, and municipal wastes to biogas (Guo et al., 2015). In the National Renewable Energy Action plan, anticipated biogas production in the European Union is 28 billion ...

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